# What is magnetic permeability Class 12?

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Magnetic permeability is defined as the ratio of the magnetic induction to the magnetic intensity. It is a scalar quantity and denoted by the symbol μ. Magnetic permeability helps us measure a material’s resistance to the magnetic field or measure of the degree to which magnetic field can penetrate through a material.

## What does magnetic permeability mean?

Magnetic permeability, relative increase or decrease in the resultant magnetic field inside a material compared with the magnetizing field in which the given material is located; or the property of a material that is equal to the magnetic flux density B established within the material by a magnetizing field divided by …

## What is meant by permeability?

1 : the quality or state of being permeable. 2 : the property of a magnetizable substance that determines the degree in which it modifies the magnetic flux in the region occupied by it in a magnetic field.

## What is magnetic intensity class 12?

Magnetic Intensity Definition: The degree to which a magnetic field can magnetise a substance or the capability of external magnetic field to magnetise the substance is called magnetic intensity. The magnetic field produced by the external source of current is called magnetising field.

## What is magnetic permeability and susceptibility?

Magnetic susceptibility is a dimensionless proportionality constant that indicates the degree of magnetization of a material in response to an applied magnetic field. … A closely related parameter is the permeability, which expresses the total magnetization of material and volume.

## What are the 3 types of permeability?

• Permeability.
• Units.
• Applications.
• Description.
• Determination.
• Absolute permeability (aka intrinsic or specific permeability)
• Permeability to gases.
• Tensor permeability.

## What material has the highest magnetic permeability?

Values for some common materialsMediumPermeability, μ (H/m)Relative permeability, max. , μ/μ0Cobalt-iron (high permeability strip material)2.3×10−218000Iron (99.8% pure)6.3×10−35000Electrical steel5.0×10−34000Ferritic stainless steel (annealed)1.26×10−3 – 2.26×10−31000 – 1800Ещё 36 строк

## What is permeability formula?

Magnetic Permeability Formula

Magnetic permeability formula is given as; Magnetic permeability (u) = B/H. Where B = magnetic intensity and H = magnetising field. The SI unit of magnetic permeability is henries per meter (H/m) or newtons per ampere squared (N⋅A−2).

## What is permeability and its types?

 Three types of permeability  Absolute permeability – the permeability of a porous medium with only one fluid present (single-phase flow).  When two or more fluids are present permeability of the rock to a flowing fluid is called effective permeability (ko, kg, kw).

## What causes permeability?

Vascular permeability can be influenced directly by molecules that cause the barrier to disintegrate, whether it is a transvessel pore or a junction that needs to be opened. The relative extent of permeability can also be indirectly regulated by the blood pressure and the resulting blood flow.

## What is motional EMF?

About Transcript. An emf induced by motion relative to a magnetic field is called a motional emf. This is represented by the equation emf = LvB, where L is length of the object moving at speed v relative to the strength of the magnetic field B.

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## What is magnetic flux density?

magnetic flux density. A vector quantity measuring the strength and direction of the magnetic field around a magnet or an electric current. Magnetic flux density is equal to magnetic field strength times the magnetic permeability in the region in which the field exists.

## What is magnetic retentivity?

Retentivity – A measure of the residual flux density corresponding to the saturation induction of a magnetic material. In other words, it is a material’s ability to retain a certain amount of residual magnetic field when the magnetizing force is removed after achieving saturation.

## What is the value of μ?

The permeability of free space, μ0, is a physical constant used often in electromagnetism. It is defined to have the exact value of 4π x 10-7 N/A2 (newtons per ampere squared). It is connected to the energy stored in a magnetic field, see Hyperphysics for specific equations.

## What is absolute permeability?

Absolute permeability is an ability to flow fluid through a permeable rock when only one type of fluid is in the rock pore spaces. The absolute permeability is used to determine relative permeability of fluids flowing simultaneously in a reservoir.

## What is magnetic susceptibility how does it vary with temperature?

… magnetization is given by the magnetic susceptibility of the material χm, which… … Paramagnetic susceptibility is inversely proportional to the value of the absolute temperature. Temperature increases cause greater thermal vibration of atoms, which interferes with alignment of magnetic dipoles. 